From: Jan Wedekind <jan@wedesoft.de>
To: Lawrence Bottorff <borgauf@gmail.com>,guile-user@gnu.org
Subject: Re: Simulating rational number addition/subtraction
Date: Thu, 25 Feb 2016 06:52:40 +0000 [thread overview]
Message-ID: <b36dae8a-4dd0-4156-81f4-20f42a9d0c40@email.android.com> (raw)
In-Reply-To: <CAFAhFSXeLgX73qZrF5ns1wkRHZZZ3sjsNKSBOXKWcTsXxn+hag@mail.gmail.com>
On 24. Februar 2016 22:27:45 GMT+00:00, Lawrence Bottorff <borgauf@gmail.com> wrote:
>With guile (and a few other Schemes/Lisps) you can directly add
>fractions
>or rational numbers:
>
>(+ 1/2 1/12)
>=> 7/12
>
>It's like magic, no? Anyway, I'm trying -- for educational purposes --
>to
>reproduce this functionality. But right out of the blocks I'm stuck
>trying
>to figure out how to handle incoming parameters. So far I've got
>
>(define (myrat a b)
> . . .)
>
>(define (myrat a b c d)
> . . .)
>
>where numerator and denominator are given separately, as well as
>
>(define (myrat . fracparams)
> . . .)
>
>which still has my basic problem, namely, can one parameter hold both
>parts
>of a rational number, then allow the numerator and denominator to be
>peeled
>off and worked on, i.e., something like
>
>(let ((num1 numepeeler(a))
> (denom1 denompeeler(a)
>
>
>LB
You can use GOOPS (*) to represent the rational numbers.
(*) http://www.gnu.org/software/guile/manual/html_node/GOOPS.html
--
Jan Wedekind
http://www.wedesoft.de/
prev parent reply other threads:[~2016-02-25 6:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-24 22:27 Simulating rational number addition/subtraction Lawrence Bottorff
2016-02-24 23:32 ` dsmich
2016-02-25 7:07 ` tomas
2016-02-26 13:01 ` Alex Vong
2016-02-25 6:52 ` Jan Wedekind [this message]
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